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