The reason that this keeps getting repeated is that it's a not-unreasonable summary/digestion of Peter Thiel's position, though you're correct that it's not precisely what he's saying.

Reading that quote by him in context, Peter Thiel's nuanced stance is more along the lines of "The extension of voting rights to women has likely resulted in an America that I think is worse/less preferable to the one that would probably exist if women were not allowed to vote".

So no, he hasn't advocated for taking away the vote from women in as many words, he just makes it known that he wishes they had never been allowed to do so. One can reasonably see how these positions are similar enough that some people have editorialized slightly. Especially since, given these views, it seems also reasonable to suppose that were the question of women voting to be put forth once more, he would probably vote against.