I cannot find a CY8CKit-033.
If you are referring to the Kit-003 you can get all the schematics from this stie www.cypress.com/ although I suspect that the block-diagram is just an example what you may perform with the kit and not the real application.
The 003A kit is obsolete, and did not have a I2S Audio ADC on it.
The block diagram you show is PSOC abilty to interface to an I2S device, in your case
an ADC. The block diagram is just a capability diagram of what PSOC can do and interface
Cirrus Logic CS42L51 for the win