There is not really any simple way of making presets for Axoloti.
The most effective one is probably using a table. If you are using a midi controller, then route the midi cc value to a table write and write the data. And then use a table read for setting the value to its destination.
The you can just save the table data to the sd card. This works even when not connected a computer.
It works wel,l but it does take a little time to understand and setup.