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