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