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