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