How to make my certain categories grid looking?

You would need to create a new template file for the category that you want to have a custom layout.

category-{slug}.php – If the category’s slug were news, WordPress would look for category-news.php

http://codex.wordpress.org/Template_Hierarchy#Category_display

Then you’d need customize that file to output the files the way you want. This will require HTML, CSS and PHP knowledge.