One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,7,10,5,11,6,20)(3,8,12,25,14,24,15,22)(4,16,21,30,18,9,19,26)(13,23,27,32,17,29,28,31)(1,3,7,15,5,14,6,12)(2,8,10,22,11,24,20,25)(4,17,21,27,18,13,19,28)(9,23,26,31,16,29,30,32)(3,12,14,15)(8,22,24,25)(13,27,17,28)(23,31,29,32)(1,4,5,18)(2,9)(3,13,14,17)(6,19,7,21)(8,23)(10,26)(11,16)(12,27,15,28)(20,30)(22,31)(24,29)(25,32)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.