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