I find it strange that the editor would ask for a draft of the paper during the pre-submission inquiry. Reputable journals would never do that. It's the norm of the academic publishing industry to not send/ask for the entire manuscript during pre-submission inquiry. The purpose behind pre-submission inquiries is that the editor would not have to spend time going through the entire manuscript. Sending a draft of the manuscript would defeat that purpose.
I don't think you should send a draft of your paper to the editor. If the journal turns out to be a predatory one, it would be a great risk. I would suggest you check the journal website carefully and confirm that it is not a predatory journal before you continue your interaction with them.