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