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