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