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