It used to be that you needed commercial tools such as Embarcadero ER/Studio or Quest Toad to build Entity Relationship Diagrams (ERD) of databases. Microsoft SQL Server Management Studio 2005 and 2008 has this feature.
The new editions of MySQL Workbench (like 5.2.27) Community Edition now contain a feature that lets you build an ERD of the LiveCycle (ES and ES2) database.
Once downloaded, installed and connected to the MySQL instance, choose the menu option Database->Reverse Engineer and choose the schema you dedicated to LiveCycle to get the complete ERD. Please note that since a full LiveCycle installation can consist of up to 180 tables, this can take a few minutes.