My Google-fu is only bringing up articles on schools of magic and not a breakdown of the spells by school. I’m playing a Lunar Sorcerer soon and realize I don’t know the spells by school very well and want to print a cheat sheet so I can make sure I’m utilizing my Moon Phase to its fullest potential in terms of sorcery points. 

Try here: https://donjon.bin.sh/5e/spells/

It'll let you see all the spells and you can filter them by class, level, components, school etc.

You can also use the following link and sort by school of magic by clicking “show advanced filters:” (https://www.dndbeyond.com/spells/class/sorcerer).