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