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