Large Format

Like Monica suggested, it sounds like your original artwork is a Large Canvas document. 32 feet goes well beyond the normal 227" max canvas size limits Adobe Illustrator has had since it changed from a Postscript to PDF foundation around 20 or so years ago. Before that the max canvas size was only around 10 feet.

In my own experience, PDF files generated by Adobe applications and certain other rival applications don't tend to work so well if canvas sizes go beyond 200 inches in any direction. I've seen some PDF files glitch out going beyond 150". I'll open the PDF in Acrobat DC or load it into the large format RIP application and see a blank document.

Which large format RIP application are you using? If you're using a leading one (such as Caldera on OSX or Windows-based RIPs like Onyx and RasterLink Pro) it should have an Adobe certified PDF engine and be able to scale the artwork up to a desired size. These RIPs also have paneling options as well as options to print and/or cut.

Adobe Illustrator large canvas documents will typically drop to 10% of their previous size when AI files are saved down to an earlier file version. The same thing tends to happen when the artwork is exported in PDF or EPS. Rival graphics applications (such as CorelDRAW) don't understand the newest AI file formats with large canvas capability used. In the end we're forced to create PDF files at a reduced scale, such as 10% of actual size or 1 inch equals a foot scale. When loading the PDF into the RIP application the artwork is scaled back up to full size with a numerical input. Obviously anyone needs to take precautions when working in scale. I prefer expanding any live outline strokes (or just using the Path Offset feature instead). I'll also convert any live type to outlines if the lettering is big and there isn't much of it. Big blocks of body copy can remain as live area type as long as the fonts can be embedded in the PDF.