A few ideas, some cheaper and more tongue in cheek than others. All with a superficial slant, some may have a small performance upgrade as well…
Ditch the current bottle cage and bottle. Replace with an Elite Custom cage and matching Corsa bottle.
Change the tyres for skinwalls. Something like a Veloflex Master will do the job.
Remove the plastic dish from behind the cassette.
White bar tape AND white saddle would look good on that as well. But it has to be both, a white saddle and black tape (or vice-versa) will not work.
Road pedals look better on a road bike.
I’m debating telling you to slam the stem as well. It will certainty look better though it may mean your bike become uncomfortable. Maybe slam it and take yoga lessons as well?
That’ll do for a start I think.