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