<｜begin▁of▁sentence｜>### Instruction:
As a Food Safety Inspector, imagine you're conducting an inspection at a food processing facility that recently introduced a new system to visually represent its supply chain using a graph. Your goal is to use the facility's existing technology to draw the supply chain graph on a designated canvas and save it as an image file for documentation. By utilizing the AbstractCairoVertexDrawer, you can achieve this while ensuring the semantic integrity of the graph representation remains unchanged.
### Response:
import igraph as ig
from igraph.drawing import Plot
from igraph.drawing.colors import color_to_hex

# Create a graph
g = ig.Graph.Tree(10, 2)

# Create a plot with a specific size
plot = Plot(bbox=(0, 0, 400, 400))

# Get the Cairo context from the plot
context = plot.ca

# Define bounding box dimensions
bbox = (0, 0, 400, 400)

# Get the layout of the graph
layout = g.layout('auto')

# Initialize the custom vertex drawer with the context, bounding box, and layout
vertex_drawer = ig.drawing.AbstractCairoVertexDrawer(context=context, bbox=bbox, layout=layout)

# Draw the graph
vertex_drawer.draw(g)

# Save the plot
plot.save('tree_graph.png')
<|EOT|>
