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