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