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