The diagram you downloaded is available in these formats:
- DRAWIO
- SVG

You can customize them for your organization using the associated tools:
- For DRAWIO format, use draw.io for Confluence, online at diagrams.net, or the desktop app. Go to diagrams.net for more information.
- For SVG format, use an SVG editor such as Inkscape or Sketsa SVG Editor, which are free and available for Windows, macOS, Linux.

Note that all diagram components are ungrouped and in a single layer.