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