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