I was previously using GD Rating plugin. Given that polldaddy also provides Rating posts along with polls, I removed the GD Rating plugin.
In the Ratings setup for polldaddy, I enabled rating for blog posts as well as in the front page for each blog post and I put the position as below.
I noticed that the star rating appears in very few posts only when in archive view, e.g. Category etc. and when we look at each individual blog post, the 5 star rating do not appear.
The graphene theme has a Slider on top of the page. I noticed that after the recent update of Polldaddy to 2.0.15, the stars do appear under the random posts that slide on the top of the home page. The stars also appear under each post when I do a search by Category or Tags in the search result.
However the stars do not appear on the other posts below the slider, or when I display a full post.