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