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)(11,16,12,14)(17,18,21,24)(19,27,28,23)(20,29,31,25)(22,26,30,32)(9,10)(11,14)(12,16)(13,15)(17,19,21,28)(18,23,24,27)(20,22,31,30)(25,26,29,32)(2,5)(6,8)(9,11,13,12)(10,14,15,16)(17,19,22,20,21,28,30,31)(18,23,26,25,24,27,32,29)(1,3,4,7)(2,6,5,8)(9,11,13,12)(10,14,15,16)(18,24)(23,27)(25,29)(26,32)(9,12,13,11)(10,14,15,16)(17,20,30,19,21,31,22,28)(18,25,32,23,24,29,26,27)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.