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