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