Using 'make towards' suggests a deliberate or intended move in a certain direction. Noticing the sky darkening, they made towards the nearest shelter.
Pro Tip 2/3
Subtle Approach
'Make towards' can imply a more subtle or less direct approach than simply 'going' somewhere. She made towards the conversation circle, hoping to join in discreetly.
Pro Tip 3/3
Implies Destination
'Make towards' often implies there is a specific destination or target in mind. After the toast, everyone made towards the buffet table.