APM Cookbook: AutoLaunch SAML Resources
Stephane Picard,
This article won't provide any benefit for the Big-IP as SP use case, only Big-IP as IdP.
When Big-IP is acting as a service provider you just need attach to the application's virtual server an access profile with a SAML Auth object. That is where you configure it to act as a SAML SP and redirect to the IdP for authentication automatically with an SP initiated authentication request. It will also accept IdP initiated authentication automatically.
If you just want a link, you could link to however the IdP auto-initiates and IdP initiated authentication, or you could just link to the virtual server with your application and it will automatically start SP initiated authentication if your access profile is setup properly, nothing special needed.