What is the best way to introduce yourself as a new employee to the company president?

Say it like it is. Hello, (or Good morning/afternoon) I am John Smith and I have just started working in the Finance Department as Accounts Supervisor. Adjust according to your circumstances. If you have to make an appointment say it is just to introduce yourself as a new employee. Do not wear anything outrageous, the time to make a statement is not when you first arrive.