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