Select the desired Minecraft version using the dropdown above, then press the big green Code button and select Download ZIP.
Note that you will have the extract the folder out of the zip to your resourcepacks
folder to install due to how GitHub zips branches.
If you want to submit your textures to Faithful 32x Mods, please make a pull request to the correct version branch. If you're making textures for a Minecraft version that's not yet supported, make sure to give the branch you're working on an appropriate Minecraft version number.
The Faithful 32x Guidelines are not strictly enforced. As long as your textures aren't terrible and generally match the artstyle of the rest of the pack, your pull request will be accepted.
Do note that by submitting your textures you agree to license them under the Faithful License.