Yes wait at least a day, unless the leaves start looking droopy tomorrow, then that means your plumeria is thirsty and needs water. It is always better to be on the safe side of not over watering. It is very seldom that plumerias will die from under watering, it is more likely to die from root rot from over watering.
I am a lazy about watering that's why I grow plumerias, desert roses, aloes and succulents since they are drought resistant. Some of my potted plumerias will have droopy leaves for a day or 2 before I can remember to water but the leaves will perk back up once watered. Others believe that by withholding watering it will force it to bloom but per my experience it is not true, I would have all of mine blooming if that is the case
The great news is, you are past the critical stage of your plumeria rooting judging from the number of leaves you have. That usually means, you have a good root system, especially if you started with a cutting that has no set of leaves. My plumerias thrive on neglect, but I have so many, with some on the ground and in pots that they get watered when I remember to water because the leaves look droopy.
