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