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