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