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