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