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