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