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