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