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