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