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