Charcoal, 16 bytes

Ｇ⌈T¬↑←↑→³X↘XOＵＥ¹ 

Try it online! Link is to verbose version of code. Uses X and O for the output characters. Explanation:

Ｇ⌈T¬↑←↑→³X 

Draw the pegboard. ⌈, T and ¬ are shortcuts for →↓, →↓← and ↓← respectively. There are no shortcuts for ↑ because e.g. ↑← would look the same as →↓, so I optimise by having one fewer ↑ operation. This also has the effect of leaving the cursor nearer the centre.

↘XO 

Change the centre square to an O.

ＵＥ¹ 

Space out the pegboard horizontally.

Charcoal, 16 12 bytes

Ｅ³XX‖Ｏ↘¬OＵＥ¹ 

Try it online! Link is to verbose version of code. Uses X and O for the output characters. Explanation:

Ｅ³XX 

Output a 2×3 rectangle of Xs.

‖Ｏ↘¬ 

Reflect diagonally downright, then separately down and left, to complete the remaining Xs.

O 

Output the central O. (It saves a byte to do this here rather than elsewhere in the code.)

ＵＥ¹ 

Space out the pegboard horizontally.