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