This one is from Simpsons creator Matt Groening. It has Homer eating a plate of donuts with Chief Wiggum and Mrs Krabapple as the other people. This one is available as a poster from many places as well. The waiter doesn't seem to be an official Simpsons character. The diner is now a donut shop called "Yummy's Donuts" and the coffee machines have been replaced with an orange drink machine and a slushee machine.
This image above is not from an episode and is only a print. The Simpsons actually did an episode where the diner made an appearance however. The episode was titled "Homer vs. The Eighteenth Amendment", and was the eighteenth episode of The Simpsons' eighth season. In it, prohibition is enacted in Springfield and Homer helps fight it by illegally supplying alcohol to the town. The notable change to the diner is that it now has booths like a more modern restaurant.