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