Answer
The reaction will shift left.
Work Step by Step
There are more moles of gas on the side of the reactants than on the side of the products. When the volume increased, the pressure in the container decreased. In order to raise the pressure closer to its initial value, the reaction will shift left to create more moles of gas. The concentration of $SO_2$ and $O_2$ will increase, but the pressure of $SO_3$ will decrease.
