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