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