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