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