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