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