Intense diplomatic discussions have been ongoing on the sidelines of the council meeting since a much-anticipated U.N. report last month stipulated that "serious human rights violations have been committed" in Xinjiang that may amount to crimes against humanity.
read moreA spokesperson at China's diplomatic mission in Geneva did not immediately respond to a request for comment.
The so-called "draft decision" reviewed by Reuters is so far backed by the United States, the United Kingdom, Canada, Sweden, Denmark, Iceland and Norway, diplomats said.
China might seek to dismiss it with a no action motion.
The Western-led call for a debate is seen as a less confrontational option than a resolution which could have sought a Xinjiang probe, although this could be raised later.