It's been done before. I've used the image below, taken by Cassini in 2006, when I teach Solar System Astronomy showing Earth just above the rings of Saturn (but almost a billion miles away). It's the pale blue dot first made famous by the late astronomer Carl Sagan back in 1994 from Voyager spacecraft images. All humans who've ever existed were born and died on that little blue dot.
The Cassini Imaging Team Leader Carolyn Porco has organized an event called The Day the Earth Smiled and is urging everyone to go outside when Cassini is imaging Earth and smile, wave, raise a glass, whatever to Saturn. Really, to ourselves, as humans, for having the ability to take a group picture from a billion miles away.
At 5:30 pm, here in the Hudson Valley, Saturn will be out (but not visible since it's daylight). It will be about 30 degrees above the horizon in the southeastern sky (148° azimuth). It will also be some 900 million miles away from us. The image below shows the positions of Earth and Saturn in the solar system today.
Can you see why Saturn is in the southeastern sky in the evening? Below is a simplified view of the orientation of the Sun, Earth, and Saturn (not to size or distance scale).
So today at 5:30 this evening, here in the Hudson Valley, go outside, face the southeast, and smile at Saturn. I'll post the picture from NASA as soon as it's released (and take a picture of myself waving to Saturn from Earth).