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