The Goddess and God of Wicca have numerous names and numerous manifestations. Which names are used, and how the altar is decorated will vary somewhat not only fron to Wiccan to Wiccan but from ritual to ritual. (Groups and individuals, however, do tend to to use the same basic altar-arrangement over and over again.)
Here, Aradia is represented by a statue. Cernunnos is represented by a naturally shed stag antler. Goddess symbols on this altar include rosemary and a small shell. God symbols include ivy and a small piece of wood. In the center is a lunar and solar image combined. Also on the altar are a candle snuffter, faery offering bowl, bottle of wine, and brass pentacle. The elements are represented by a brass incense burner (air/east), a candle in a jar (fire/south), chalice with mead (water/west), and salt (earth/north).
Please note this arrangement is for an out door daytime ritual. This arrangement is not precisely the same as a Full Moon ritual altar.