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