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