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)(11,16)(12,14)(13,15)(17,18,23,22)(19,24,29,32)(20,25,21,26)(27,31,28,30)(2,5)(6,8)(17,19,23,29)(18,24,22,32)(20,30,21,31)(25,27,26,28)(9,11,13,12)(10,14,15,16)(17,20)(18,25)(19,27)(21,23)(22,26)(24,31)(28,29)(30,32)(9,12,13,11)(10,14,15,16)(17,21,23,20)(18,26,22,25)(19,28,29,27)(24,30,32,31)(1,3,4,7)(2,6,5,8)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.