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