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