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