I've said this a thousand times here but here goes again....low opacity soft light layer. Boosting saturation is not the way to gain vibrance imo. It can help if used sparingly but you need contrast as well. The soft light layer does both. Before that, I'd open the image in PS using the Open As, then select Camera Raw from the drop down. In ACR, use the sliders to add fill, bring down exposure, deepen blacks and add some vibrance (which is really a mid tone contrast adjustment). Then open the image in PS, tweak as desired, add the soft light layer at whatever opacity suits you and I think you'll see a lot more zing. If that doesn't do it, then the image is probably not a keeper. Hope this helps. Let me know if you have questions.
Scott