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