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