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