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