It's a skeleton, it's going to look different when it's got flesh on it.
Comics didn't have professional film creature designers to work on them. Of course it wouldn't look like what the comics depicted. Barlowe or Tatopoulos (right now) would do a kick-ass Jockey design.
Some of Giger's other artwork of various humanoid entities would be a good starting point for the texture and look of a space jockey.
I've mentioned this before, and I even asked if anyone knew what I was talking about, but some years ago I ran across a website which told the story of the Jockey ship landing on Acheron, and it had sort of a graphic novel approach to it, telling the story in paragraphs and with Giger-esque still images. I haven't been able to find it since, but the way it depicted the Jockey would be the way I would have gone, personally.