It is important to remember that scales, arpeggios and techniques are just the tools for making music. What moves people most is the emotion in music. When you are playing a song, everything you play should help communicate the meaning and emotion of the composition itself.
The great tenor saxophonist Lester Young once said he would never improvise on a song he didn’t know the words to. Listen to singers and the way they express the lyrics and the melody. When you hear a great sax player (or any great instrumentalist) it is almost as if they are singing through their instrument. The following solo uses a vocal style and uses many expressions which are not written on the page. Listen carefully to the recording and try to get all these expressions into your playing. The next step is to add these expressions to your own improvising. Keep practicing, keep playing and have fun.