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