Mine is on the shaded side of a large pot. The stems you can see behind it - really, in front of it, as the sun comes from behind them - are of a tall Salvia 'Amistad'. The euphorbia is helping to cover the bare lower parts of the stem. The leaves, which are not visible in the photo, provide dappled shade. So far, so good and the days are becoming a little cooler now. We have had a consistently hot summer this year.
If my cuttings survive the winter, I will experiment with them in various points around the garden. I suspect they need a lot of water in full sun. Mine wasn't looking too healthy when I bought it. It was in quite heavy shade under a sunscreen. More light and regular watering seem to have improved it. But no full sun at all yet. The rising sun will hit it sideways but will soon swing round a leave my plant alone.