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