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