Garred, it's easy to do. You just print up your pattern which you can find off Google Image, then work with a word processor to get the pattern down to scale and repeated into a sheet, like this:
Then you can have fun bringing in some very cool upholstery patterns and graphics to your builds . . . using white glue. If you use a laser printer, make sure you coat the final graphics with dullcoat . . . or something similar . . .
On some of my wilder builds, I like to have fun with this stuff as you can see here: