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