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