You will want to plant any oriental lilies in filtered light or part shade especially if you get hot summer sun. Mark them when they bloom so you can move them next fall. If you are not sure if they are orientals, post photos here so we can help you out. Looks like you are in for a great show next year.
How you group them is really up to you, what you like. Maybe you don't care for clashing colors, such as pink and orange next to each other. I grow mine in rows and use them for making crosses to get seed so color placement doesn't matter so much to me. They are happy with companion plantings, for example leafy plants/annuals that will help shade the soil around the lilies' root area.
