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