I enjoy using git diff --color-words to clearly see the words that have changed in a file:
If you want to see clean diffs with line similarity matching, better word comparison, syntax highlight and more check out diff2html which is very customizable git diff to HTML presenter.
To use it on the command line you can check diff2html-cli which is a simple CLI written in Node.js.
So you can share your diffs with colleagues it integrates with diffy.org.
Check out a diff sample here.