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