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