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)(11,16)(12,22)(13,17)(14,18)(15,19)(20,23)(21,24) involution — undirected(1,3)(2,5)(4,8)(6,7)(9,11,15,21)(10,16,19,24)(12,23,18,13)(14,17,22,20)(9,12,14,10,15,18,22,19)(11,16,20,23,21,24,17,13)(2,6)(5,7) involution — undirected(3,8)(5,7)(9,13,14,16,15,23,22,24)(10,17,18,11,19,20,12,21)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.