For creating diagrams, LBL recommends using diagrams.net (formerly draw.io). diagrams.net is an open source application, provides most of the functionality that Lucidchart provides and it works with GSuite apps, such as Google Drive and Google Docs.
The diagrams can be exported to various formats: PNG, PDF, JPEG, SVG, VSDX, XML, HTML.
Besides the online tool, diagrams.net also offers a stand-alone, offline desktop application. It works on Windows, macOs, and Linux. Download the application from https://get.diagrams.net.
Getting Started
To bring up diagrams.net, go to the ‘waffle’ 
Select ‘Create New Diagram’ when prompted
Choose a template or go with a blank diagram
Select ‘Yes’ will save the new diagram to the root of your ‘My Drive’ or select ‘No’ to choose another location in Google Drive
If ‘No’ is chosen, the window below will appear. Select a folder to save the new diagram.
Folders - folders in your ‘My Drive’
Google Drive - folders in your ‘My Drive’, ‘Shared drives’, and ‘Shared with me’
Shared drives - your ‘Shared drives’ (Note: you cannot select the drive, you have to select a folder within the drive)
Previously selected - list of recent folders and files (files are greyed out)
The search bar can also be used to search for folders in Google Drive.
The editor will open up and you can begin.
