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