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