The whole tree on one page
Use it to check, never to recite
A tailored tree is a starting structure, not your answer. The client's question decides the final framework, and the keep-or-cut test runs on every branch: if I found the answer here, could it change the recommendation? Usually three or four branches survive.
From the whole tree to your client's question
Start from the decision the client has to make, keep the branches that could change it, and say where you would start and why. How to build one that does not sound memorized: How to Build a Case Interview Framework That Does Not Sound Memorized. The questions that tell you which branches matter: clarifying questions.