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