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