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)(9,14)(13,17)(15,18)(19,20,23,25)(21,27,28,34)(22,30,32,26)(24,31,33,29)(3,5,8,15)(4,9,11,17)(6,14,7,13)(10,18,16,12)(19,21,23,28)(20,24,25,33)(22,31,32,29)(26,34,30,27)(22,32)(26,30)(27,34)(29,31) involution — undirected(3,6,8,7)(4,10,11,16)(5,13,15,14)(9,12,17,18)(20,25)(21,28)(26,30)(29,31)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.