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