Imagine you close your eyes and each time you open your eyes, a small dot appears where the electron is. After a while, you would see a cloud of dots in a spherical shape. Each dot then represents the position of the electron when you opened your eyes.
Most of the dots you see would be at a certain distance from you called the Bohr radius, but some dots are closer and others are further away. For an s-electron in this case, you would even see some dots inside the nucleus.