When workers' wages rise, the supply curve shifts to the left. This means that at a certain price level, the rising cost of inputs into the goods (including wages) will cause less of that good to be produced. Inputs are the resources necessary to produce the good, including workers' wages. The curve shifts to the left because there is less opportunity to make a profit from that good. If the cost of other inputs, such as the cost of energy, rises, it will have a similar effect on the supply curve.
For example, if the wages of workers at a fast food chain increase and the cost of a hamburger stays the same, the cost of making each hamburger will increase. Therefore, fewer hamburgers will be produced at that price level because each hamburger will result in less profit, and the supply curve will shift to the left.