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