diff --git a/conntrackt/utils.py b/conntrackt/utils.py
--- a/conntrackt/utils.py
+++ b/conntrackt/utils.py
@@ -155,8 +155,8 @@ def generate_project_diagram(project):
     # Get distinct colours, one for each node/entity.
     colors = get_distinct_colors(entities.count())
 
-    # Created nodes based on entities, and put them into correct cluster.
-    for entity in entities:
+    # Create nodes based on entities, and put them into correct cluster.
+    for entity in entities.order_by("pk"):
 
         # Try to get the existing cluster based on location name.
         location = entity.location
@@ -169,7 +169,7 @@ def generate_project_diagram(project):
             clusters[cluster_name] = cluster
 
         # Fetch a colour that will be associated with the node/entity.
-        node_color = colors.pop()
+        node_color = colors.pop(0)
         node_colors[entity.id] = node_color.hex
 
         # Determine whether the node label should be black or white based on brightness of node colour.