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