Drafting bylaws is usually the responsibility of the Chief Administrative Officer (CAO) or a person delegated that function. There are resources available, such as: (a) Have your municipal solicitor prepare bylaws. (b) Contact your municipal association for a sample bylaw if one is available.
There's plenty of work that goes into writing bylaws, so let's break down what you need to get writing! Research. Form a committee. Create the structure. Outline your organization's key roles and responsibilities. Establish your meeting rules. Define your membership. Address finances. Outline the amendment process.