One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,6,11,8,12,7,24)(3,13,23,9,15,26,5,22)(4,16,19,27,21,29,20,10)(14,25,31,32,17,30,18,28)(1,3,7,23,8,15,6,5)(2,9,11,13,12,22,24,26)(4,17,20,18,21,14,19,31)(10,25,16,28,27,30,29,32)(1,4,8,21)(2,10)(3,14,15,17)(5,18,23,31)(6,19,7,20)(9,25)(11,16)(12,27)(13,28)(22,30)(24,29)(26,32)(1,5,6,15,8,23,7,3)(2,9,11,13,12,22,24,26)(4,18,19,17,21,31,20,14)(10,25,16,28,27,30,29,32)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.