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