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