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