This is a brief overview, but outlining some student protests and strikes in Africa in 1968, a lot of these I did not know about:
http://roape.net/2018/05/31/africas-1968-protests-and-uprisings-across-the-continent/
They briefly mention Senegal, there's a longer article by the ICC here: https://libcom.org/library/may-1968-senegal