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