Hard to put it in words, but I'll try 
EDIT: almost forgot - you'll need paracord about 30 times the length of your handle, maybe more to be on the safe side. Would hate to run out of paracord 2/3 of the way...
Cut it in two, making the first one a little longer as it will also form the core of the handle.
Take the first part, fold it in half, loop the double cord around one snap bolt's eyelet, then thread the two ends across each other through the second snap bolt's eyelet at the length you want the handle to be. This will become the "core" of the handle - it will prevent the weaved part from stretching when under load. Now take the other part and thread it through the second bolt snap's eyelet. arrange the four ends so that if you were looking from the top, they form a cross. Now take two opposing ends and make loops over their perpendicular ends....
... and just as my head was about to explode, I found this video - apparently this type is called "crown knot" 
Follow this knot until you reach the other end of your "core", secure the ends and melt them down.