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