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