Use this link to download and install Visual C++ 2015 Build Tools. It will automatically download visualcppbuildtools_full.exe and install Visual C++ 14.0 without actually installing Visual Studio. After the installation completes, retry pip install and you won't get the error again.
I have tested it on following platform and versions:
Python 3.6 on Windows 7 64-bit
Python 3.8 on Windows 10 64-bit
