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