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