It will be the same again this year, this is from the UEFA website:
Draw procedure
For the first qualifying round equal numbers of seeded and unseeded teams have been allocated to five groups in accordance with rankings established at the beginning of the season – four of ten teams and one of 12. For each group, balls containing seeded teams will be placed in one bowl and unseeded teams in another. A ball from each will be placed in a large empty bowl in the middle, and the first team drawn will play its first match at home. Clubs from the same association cannot be drawn against each other.
The 80 teams involved in the second qualifying round are divided into eight groups of ten, each containing five seeded and five unseeded teams. The draw follows the same procedure as the first qualifying round.