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