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