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