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)(19,20,22,26,23,25,29,32)(21,24,27,31,28,30,33,34)(3,5,7,13)(4,8,10,11)(6,14,15,12)(9,17,18,16)(19,21,23,28)(20,24,25,30)(22,27,29,33)(26,31,32,34)(3,6,7,15)(4,9,10,18)(5,12,13,14)(8,16,11,17)(20,25)(22,29)(24,30)(27,33)(4,10)(8,11)(9,18)(16,17) involution — undirectedA 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.