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