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