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