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