A bit cynical answer
Once you've installed a keyboard layout on Mac, you can print it out via the toolbar button on the view layout window.

A more constructive :-) answer
The standard Mac layout for Ukrainian is awful:
- it has
і and и swapped;
- it has comma and period in unusual places Shift+6 and Shift+7;
- apostrophe is misplaced;
The solution is Ukrainian Typographic Layout (Windows/Mac) based on Ilya Birman's typographic layout (the latter is a huge topic, see below).
I actually use it myself (a derivative of). It is a combined Ukrainian/Byelorussian/Russian layout. For example, I have Ukrainian і placed on S, while Russian ы under AltGr+S.
At the same time, UA/BY/RU в is under D, while AltGr+D gives me a Byelorussian ў.
Note. There are different layouts available, they differ on what is "default" and what us under AltGr — either it is Ukrainian or Russian, depending on what language you type more.
Offtopic, in addition, this layout quickly makes you familiar with “extended” punctuation marks like «double quotes», ½ fractions, and so on…
Once you've got it installed, just print it as specified in the above chapter.
Further reading on Ilya Birman's layout:
Caveat: most sites on the topic are in Russian, so you need some online translator to employ.