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