That symbol is the called a "taijitu," and the taijitu represents yin and yang. You could say that it's the Tao, but the Tao is the source of and is manifest entirely in everything, both particularly and collectively. I personally think it'd just be confusing to say that the taijitu represents the Tao, but doing so would not strictly be incorrect, as such.
But then, I think it's just confusing to talk about the Tao, so there ya go.