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