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