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