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