I'd wait...
Having a cigar with a cold will lessen the experience and possibly waste the cigar. You are not going to be able to taste the cigar very well, and after the cigar, you won't be able to taste anything else either...
Plus the risk of getting smoke into your sinuses may just projong the whole mess...
I just went through this and that first cigar after the cold was gone was Great!
Just my 2cents...