If anyone doesn't care to explore the DOM themselves, this will show the Voronoi diagram and make the photo on top of it transparent. For Chrome, Ctrl+Shift+J and paste it into the console.

  document.getElementById('data').setAttribute('style','');  
  document.getElementById('content').setAttribute('style','opacity:0.7;left:0;top:0;margin:0');
  document.getElementById('underlay').setAttribute('style','left:0;top:0;margin:0');