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