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