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