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