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