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