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