Sorry, but the costs you incur going to work and back home again aren't deductible. The costs of going from job to job, once you reach your jobsite, are deductible, though. So if you were to go out and see clients once you got to work, you could deduct that mileage. But the cost of going from your final stop back home again in the evening is nondeductible commuting.
One way that you might be able to get around this is to work a little from home in the morning, thus creating a "home office" and then deduct the cost of travel between the two offices. There are a lot of people that bring work home with them and actually do work there so this may be a way to take advantage of the huge mileage you are putting on your car on a daily basis.
You should consult with a CPA or other tax professional to determine what requirements might be present to have your home office considered a true home office for these purposes.