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