Youu shouldn't have to lie! Just be honest, your diabetes doesn't determine what you can and cant do! As somebody who employs a lot of people and interviews a lot of people, I appreciate honest people. You can not be judged on having diabetes against somebody who doesn't.
Before now I have had people question me on my diabetes and think crazy things are happening. But once I have educated them, they understand why you have to check your sugars or do your insulin.
Don't let diabetes define you!!