One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,10)(4,8)(5,14)(6,9)(7,12)(11,16)(13,15)(17,18)(19,24)(20,34)(21,26)(22,40)(23,29)(25,37)(27,35)(28,39)(30,52)(31,43)(32,44)(33,59)(36,60)(38,62)(41,50)(42,56)(45,53)(46,57)(47,63)(48,72)(49,66)(51,64)(54,73)(55,74)(58,70)(61,65)(67,76)(68,79)(69,80)(71,77)(75,78) involution — undirected(1,3)(2,7)(4,11)(5,13)(6,12)(8,15)(9,10)(14,16)(17,19)(18,24)(20,30)(21,31)(22,33)(23,32)(25,42)(26,43)(27,45)(28,46)(29,44)(34,52)(35,53)(36,54)(37,56)(38,55)(39,57)(40,59)(41,58)(47,67)(48,69)(49,68)(50,70)(51,71)(60,73)(61,75)(62,74)(63,76)(64,77)(65,78)(66,79)(72,80) involution — undirected(1,4,6,5)(2,8,9,14)(3,11,12,13)(7,15,10,16)(17,20,35,63,21,36,41,66,23,38,64,72,39,65,22,37)(18,25,40,61,28,48,51,62,29,49,50,60,26,47,27,34)(19,30,53,76,31,54,58,79,32,55,77,80,57,78,33,56)(24,42,59,75,46,69,71,74,44,68,70,73,43,67,45,52)(3,12)(7,10)(11,13)(15,16)(17,21,23,39)(18,26,29,28)(19,31,32,57)(20,36,38,65)(22,35,41,64)(24,43,44,46)(25,47,49,48)(27,50,51,40)(30,54,55,78)(33,53,58,77)(34,60,62,61)(37,63,66,72)(42,67,68,69)(45,70,71,59)(52,73,74,75)(56,76,79,80)(1,5,6,4)(2,8,9,14)(3,13,12,11)(7,15,10,16)(19,32)(24,44)(30,55)(31,57)(33,58)(42,68)(43,46)(45,71)(52,74)(53,77)(54,78)(56,79)(59,70)(67,69)(73,75)(76,80)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.