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