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