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