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