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