A way to summarize a complex architecture is to use "abstract boxes" for certain known and well defined parts and computations, instead of their complete detailed architecture.
Thus a complex large model can be represented as a set of simpler abstract boxes representing different computations and layers. In this sense conciseness is retained in représentation without sacrificing clarity.
For example see the following summarization of VGG16
In an even larger net which includes VGG16 as subnetwork one can include only one "box" for the whole VGG16 network, since it can be considered as known and well-defined.
One can use any schematics software to draw the network summary (eg DIA)