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