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