Of course, we cannot provide you with an illustration on this site. If you will follow the amosweb link below, you can see an animated illustration of a shift in a demand curve.
When we talk about a shift in demand, we are talking about a movement of the demand curve -- it can move either left or right. The demand curve has shifted when there is a different quantity demanded at the same price. So a shift in demand is when consumers are willing to buy more or less of some good or service than they were before at the same price.
By contrast, a movement along a demand curve is caused by a change in price. Here, consumers are willing to buy more or less, but it is at a different price.