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