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