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