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