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