One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,5)(4,6)(7,8)(9,10,16,21)(11,17,25,42)(12,26,31,45)(13,32,35,47)(14,36,15,20)(18,29,46,30)(19,33,48,34)(22,49,52,43)(23,53,56,64)(24,41,37,40)(27,38,51,63)(28,44,60,68)(39,54,65,55)(50,62,71,72)(57,61,67,59)(58,66,70,69)(1,3,5,2)(4,7,8,6)(9,11)(10,17)(12,27)(13,23)(14,24)(15,37)(16,25)(18,43)(19,39)(20,40)(21,42)(22,29)(26,38)(28,58)(30,52)(31,51)(32,53)(33,54)(34,55)(35,56)(36,41)(44,66)(45,63)(46,49)(47,64)(48,65)(50,59)(57,62)(60,70)(61,71)(67,72)(68,69)(1,4,5,8)(2,6,3,7)(9,12)(10,18)(11,22)(13,28)(14,29)(15,30)(16,31)(17,38)(19,44)(20,45)(21,46)(23,50)(24,51)(25,52)(26,36)(27,37)(32,57)(33,59)(34,61)(35,60)(39,62)(40,43)(41,49)(42,63)(47,67)(48,68)(53,69)(54,70)(55,58)(56,71)(64,66)(65,72)(2,3)(6,7)(9,13)(10,19)(11,23)(12,28)(14,33)(15,34)(16,35)(17,39)(18,44)(20,47)(21,48)(22,50)(24,54)(25,56)(26,57)(27,58)(29,59)(30,61)(31,60)(32,36)(37,55)(38,62)(40,64)(41,53)(42,65)(43,66)(45,67)(46,68)(49,69)(51,70)(52,71)(63,72) involution — undirected(9,14,16,15)(10,20,21,36)(11,24,25,37)(12,29,31,30)(13,33,35,34)(17,40,42,41)(18,45,46,26)(19,47,48,32)(22,51,52,27)(23,54,56,55)(28,59,60,61)(38,43,63,49)(39,64,65,53)(44,67,68,57)(50,70,71,58)(62,66,72,69)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.