One vertex per element, one color per generator, with an edge from x to x·s.
(1,2) involution — undirected(3,4,6,5)(7,8)(9,12)(10,13)(11,14)(15,16)(17,25)(18,29)(19,23)(20,34)(21,27)(22,32)(24,33)(26,40)(28,36)(30,44)(31,43)(35,45)(37,41)(38,46)(39,42)(3,5,6,4)(7,9,12,8)(10,13,11,14)(15,17)(16,21)(18,30)(19,27)(20,28)(22,37)(23,25)(24,36)(26,31)(29,40)(32,45)(33,42)(34,39)(35,38)(41,46)(43,44)(7,10,12,11)(8,13,9,14)(15,18,20,32,19,31,33,46)(16,22,24,29,23,38,34,43)(17,26,28,41,27,30,42,45)(21,35,36,44,25,37,39,40)(7,11,12,10)(8,13,9,14)(16,23)(17,27)(22,38)(24,34)(26,30)(28,42)(29,43)(41,45)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.