Saskatchewan is a hard province to trace ancestors for. Your John William may have settled there, however may have stopped before reachin Sask or went further across Canada. He may have gone to the USA to settle as well, so he may not have died as you suggest.
However, I found this on Ancestry indexs. I am unsure as to whether or not this belongs to your ancestor.
Canada, Voters Lists, 1935-1980
John W Taylor 1940 Assiniboia, Saskatchewan Assiniboia
John W Taylor 1949 Rosetown; Biggar, Saskatchewan Rosetown-Biggar
John W Taylor 1958 Rosthern, Saskatchewan Rosthern
John W Taylor 1962 Rosthern, Saskatchewan Rosthern
John W Taylor 1963 Rosthern, Saskatchewan Rosthern
John W Taylor 1974 Moose Jaw, Saskatchewan Moose Jaw
All Saskatchewan, Canada, Residents Index (SRI), 1800-2012
John William Taylor 1928 Kinistino, Saskatchewan, Canada Death
John William Taylor 1971 Llewelyn, Saskatchewan, Canada Death
John William Taylor 1986 Kinistino, Saskatchewan, Canada Death
Saskatchewan, Canada, Burial Index, 1802-2011
John William Taylor 1928 Kinistino
John William Taylor 1971 Llewelyn
John William Taylor 1986 Kinistino
I hope this gives you a good starting point for your Canadian search :-)
JDC