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