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