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