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