Solidity Visual Developer is a VSCode extension developed by ConsenSys Diligence to help smart contract auditors and developers. It combines typical features of VSCode extensions like syntax highlighting and outline tools with custom visualizations provided by Surya.
The extension can be found here. Once enabled, it will start syntax highlighting Solidity code as well as offering several new functions for contract folders and contract files.
For more precise instructions, please refer to the GitHub repository.