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