<｜begin▁of▁sentence｜>### Instruction:
As an industrial hygienist tasked with ensuring workplace safety, you've been tasked with setting up a new manufacturing facility. You're using a specialized tool called CairoPolygonDrawer, which is part of the igraph's drawing functionality, to visualize the layout of the facility's network infrastructure.

In this scenario, you've generated a tree graph representing the network topology of the facility using Graph.Tree with 5 vertices and a branching factor of 2. However, you need to ensure that the visualization fits within a specific area on your computer screen, ranging from 50x50 to 250x250 pixels.

Your task is to determine how to adjust the bounding box of the drawing area in CairoPolygonDrawer to meet these size requirements while accurately representing the network graph.
### Response:
from igraph import Graph, plot
from igraph.drawing import CairoPolygonDrawer

# Create an example graph
graph = Graph.Tree(5, 2)  # A tree with 5 vertices and branching factor of 2

# Plot the graph
visual_style = {'margin': 20}
plot(graph, 'tree.png', **visual_style)

# Adjust the bounding box using CairoPolygonDrawer
drawer = CairoPolygonDrawer(plot(graph, bbox=(0, 0, 300, 300)))
drawer.bbox = (50, 50, 250, 250)
plot(graph, 'tree_adjusted.png', drawer=drawer, **visual_style)
<|EOT|>
