There is no right or wrong answer here - it depends on individual circumstances. Your disability might explain aspects of your CV (e.g. gaps in education or employment or lack of experience) that might otherwise count against you. Alternatively you might feel your disability has no relevance to your future performance at work. If you decide to mention a disability in your CV, you have the chance to anticipate and address employers’ possible concerns about recruiting graduates with disabilities.
You may decide to mention this in your cover letter instead. If so, focus on the positives – your skills and experience; your strategies for dealing with disability and achieving academic and other successes, but don’t let the issue of disability dominate the letter. You may want to consider applying to some of the organisations in the Business Disability Forum who are especially committed to equality of opportunity.