One vertex per element, one color per generator, with an edge from x to x·s.
(1,2) involution — undirected(3,4)(5,11)(6,9)(7,10)(8,13)(12,17)(14,16)(15,18)(19,20,22,26,23,24,29,31)(21,25,28,32,27,30,33,34)(3,5,7,13)(4,8,10,11)(6,14,15,12)(9,17,18,16)(21,27)(25,30)(28,33)(32,34)(3,6,7,15)(4,9,10,18)(5,12,13,14)(8,16,11,17)(20,24)(25,30)(26,31)(32,34)(4,10)(8,11)(9,18)(16,17) involution — undirected(19,21,22,28,23,27,29,33)(20,25,26,32,24,30,31,34)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.