the canvas itself is printed 32 or 33 times ( i can't remember exactly after such a long time since it first came out) for the 32 or 33 distinct colors. as seahorseinstripes has said, the canvas material is very big and it's definitely not possible to spot a repetitive pattern easily. however, one easy way to take a fake apart is to count the number of different colors the bag shows, u should be able to find all 32/33 colors since the speedy 30 is big enough.
if there are only a few colors on the bag, or all of them looks too pastel or too dark, forget it, it's a fake