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)(13,21)(14,17)(15,19)(16,20)(18,22)(23,25)(24,26)(3,5,7,9)(4,8,10,6)(11,12)(13,18)(14,19)(15,17)(16,20)(21,22)(23,26)(24,25)(3,6,7,8)(4,9,10,5)(12,17)(14,15)(18,21)(19,20)(22,24)(25,26)(4,10)(5,9)(11,13)(12,18)(14,24)(15,22)(16,23)(17,21)(19,25)(20,26) 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.