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