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