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