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