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