I don't understand Feynman diagrams, but the analogy with them makes sense in that both FGGs and Feynman diagrams generate a potentially infinite number of pict

I don't understand Feynman diagrams, but the analogy with them makes sense in that both FGGs and Feynman diagrams generate a potentially infinite number of pictures, each representing some calculation. One difference is that (as I understand it) you have to do some kind of computation for each Feynman diagram, and if there's an infinite number, you have to cut off the enumeration of diagrams at some point; whereas with FGGs, in at least some (important) cases, you do not have to enumerate the factor graphs and can in fact do computations on the whole infinite set at once.