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