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