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