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