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