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