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