Indeed the HCL website does not list any drivers specifically for Windows 8. Try any/all of the following steps -
1. Try installing the drivers for Windows 7 in Windows 8. If they install properly, that means the same driver would do for Windows 8. Otherwise the setup would produce some error like "Operating system not supported" at startup itself.
2. Use Intel® Driver Update Utility. It detects your laptop for outdated drivers and lists the required drivers for you to download and install. In most cases this works. If the utility does not work in Internet Explorer (there's some bug with IE), use Firefox (with Java installed).
3. Use some driver update utility like SlimDrivers Free which automatically detects and downloads the necessary drivers (Use this method only if (2) does not work).