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