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