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