Grant privs on entire database, not table-by-table-by-table

Under a normal role, I am the owner of a database.

CREATE DATABASE buddy_db WITH TEMPLATE = template0 ENCODING = 'SQL_ASCII';

ALTER DATABASE buddy_db OWNER TO james;

As superuser, I have granted all privs on that database to
another role:

$ psql -U pgsql buddy_db
Welcome to psql 8.3.15, the PostgreSQL interactive terminal.

Type: \copyright for distribution terms
\h for help with SQL commands
\? for help with psql commands
\g or terminate with semicolon to execute query
\q to quit

buddy_db=# grant all on database buddy_db to buddy;
GRANT
buddy_db=#

But now when I use that role to connect to that database, I don't
have privs:

$ psql -U buddy buddy_db
Welcome to psql 8.3.15, the PostgreSQL interactive terminal.

Type: \copyright for distribution terms
\h for help with SQL commands
\? for help with psql commands
\g or terminate with semicolon to execute query
\q to quit

buddy_db=> \d
List of relations
Schema | Name | Type | Owner
--------+---------------------+-------+-------
public | colors | table | james
public | shapes | table | james
public | sounds | table | james
(3 rows)

buddy_db=> select sum(1) from sounds;
ERROR: permission denied for relation sounds
buddy_db=>

What am I doing wrong?

Thank you!

Jim