One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,4)(5,6,10,17,12,18,11,16)(7,19,23,50,25,51,24,49)(8,14,29,42,30,43,28,47)(9,31,33,46,34,45,20,15)(13,35,38,58,39,52,37,22)(21,48,55,68,56,65,26,59)(27,62,53,44,32,63,60,41)(36,61,40,54,66,64,67,57)(5,7,20,52,11,24,34,58,12,25,33,35,10,23,9,22)(6,13,31,50,17,38,46,51,18,39,45,49,16,37,15,19)(8,26,60,57,28,56,32,64,30,55,53,54,29,21,27,61)(14,40,62,48,42,66,44,68,43,67,63,65,47,36,41,59)(2,4)(5,8)(6,14)(7,21)(9,32)(10,29)(11,28)(12,30)(13,36)(15,44)(16,47)(17,42)(18,43)(19,48)(20,53)(22,57)(23,55)(24,26)(25,56)(27,34)(31,63)(33,60)(35,61)(37,67)(38,40)(39,66)(41,46)(45,62)(49,59)(50,68)(51,65)(52,64)(54,58) 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.