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