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