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