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