You should pass a list of options to gvisMotionChart command, like this
..., options=list(state='{"colorOption":"_UNIQUE_COLOR"};')
I don't know if there is an option for selecting all items. I usually select a couple of them, using iconKeySettings
in the state definition, like this:
"iconKeySettings":[{"key":{"dim0":"actual"}},{"key":{"dim0":"baseline"}}]