Plot phase graph from impulse response with delay adjustment

Question

I'm trying to plot the phase graph of an impulse response with python, but the phase looks rather distorted.

How can I add a delay to my code, so that the phase graph looks better, like in this example?

I know that a have to add a delay of 1024 samples / 21.333ms, but don't know how

import matplotlib.pyplot as plt
import numpy as np

fs = 48000
taps = [...]
n = len(taps)//2+1
x=np.linspace(0, fs/2, n, endpoint=True)
h = np.fft.fft(taps)
plt.semilogx(X, np.angle(h[:n], deg=True))