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