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