From Nuraghe Miuddu, head to the gate where you enter the field and then the corner beyond it. Follow the edge of the field south - there'll be a hedgerow to your left - and climb the (low) wire fence at the end. Now clamber over the big rocky outcrop to the right. The tomba is on the slope just below and to the right a bit.
Quite ruinous, with a bush growing right in front of the centre of the esedra. There's one capstone still in place - the views from here are incredible!