WHEN SHOULD I SHOWER AFTER DYING HAIR?!?!??!?

OKAY so i got Splat! Hair Coloring and i was looking over the directions, and it said stuff like after you shower you should rinse out your hair. When i was reading i was thinking, if i shower right after i dye my hair, would all the dye rinse out??? After i'm done showering, and i'm done drying my hair, will it be dryed with the Lusty Lavender streaks in my hair??? Thank u for ur time!! If u need more info, just ask me in the box below. See ya!