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