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