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