Follow along with the video below to see how to install our site as a web app on your home screen.
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Well I don't have an S3, but on my Samsung Note, you longpress the screen that you want them on, and then you will see the choices pop up at the bottom of the screen(apps, widgets, folders) choose folders, and then scroll to contacts, and then press on the contacts folder. That should put it on your screen. All that is left is to move it to the part of the screen where you want it.
I hope that helps.
Its ever so slightly different on the S3.
Long press on a blank area of the home screen and tap "add to home screen" on the menu that comes up. Then click on "apps." Then tap on "Widgets" at the top of the screen. Scroll through the pages of widgets until you find the contact/direct dial/direct message widgets, long press on them and drag and drop it on your home screen.