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