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