Hello Agustin
In order to provide connectivity to the Internet for wireless users, you must configure a default route in the switch. Notice that for each subnet in VLANs 10, 20, and 30, a default router has been configured for each DHCP scope. These default routers are the IP addresses of the SVI ports of the switch. Assuming that the switch is an L3 switch, then you can configure another port on the switch, and connect it to the edge router, or the router that connects to the outside world. You will also have to configure a default route in the routing table of the switch to send all default traffic to the Internet.
Once that is done, then all traffic destined for the Internet will be routed correctly.
I hope this has been helpful!
Laz