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