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