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