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