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