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