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