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