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