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