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