Standard interview tips and techniques still apply. Do not speak negatively about any supervisors, coworkers or former jobs. It is acceptable to share a specific situation that occurred with a former boss, but do not go into detail about the disagreement. Focus instead on what you did to help the supervisor see your point of view.
You may be asked a follow up question, such as “Did they ultimately see your point of view?” Be honest. Did they follow your advice or didn’t they? The answer is not as important as the presentation. Do not sound bitter in your response if they did not. “They did see my point of view. They chose a different path, but they understood my concerns and beliefs in the end.”