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