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