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