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