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