As mentioned in the Denodo Model Bridge User Manual, Denodo supports data modelling (Top-Down approach) and it is implemented as Interface views in Virtual DataPort using Denodo Model Bridge.
You can refer to the [Denodo Model Bridge](https://community.denodo.com/docs/html/document/denodoconnects/8.0/en/Denodo%20Model%20Bridge%20-%20User%20Manual) User Manual for more information.
Further, Virtual DataPort metadata can be accessed through standard interfaces such as JDBC/ODBC that can be used by Data Modeling tools to import Denodo data models.
In this case, I would use an external data modeling tool to transform associations created in Denodo into Entity Relationship Diagrams as required.
Hope this helps !