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