One vertex per element, one color per generator, with an edge from x to x·s.
(1,2) involution — undirected(4,6)(7,8)(9,10)(11,12,15,19,16,20,14,18)(13,21,22,17,24,25,23,26)(3,4,5,6)(11,13)(12,17)(14,22)(15,23)(16,24)(18,25)(19,21)(20,26)(8,10)(11,13)(12,17)(14,22)(15,23)(16,24)(18,25)(19,21)(20,26) involution — undirected(11,14,16,15)(12,18,20,19)(13,22,24,23)(17,25,26,21)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.