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