If you feel more comfortable drawing out an idea to explain it then go for it (assuming you have the facilities to).
When I have a candidate who uses visuals, or other techniques rather than verbal explanation, I’m deeply impressed.
I’m impressed because it shows they are able to walk through their thinking and explain it in ways that aren’t typically associated with interviews.
It shows courage to ask to draw, doodle or use other mediums. And isn’t that weird that we should feel embarrassed to ask to deviate from a verbal answer?