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