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