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