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