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