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