The layout of a transistor is dependant upon the application.
Lets talk CMOS for a second here.
Basiclly, there is no real diff between an analog and digital transistor.
Analog transistors deal with intermidiate voltage levels (small signal), and Digital transistors only deal in two basic voltages - 0 or 1 (large signal).
i.e. digital transistors work with the largest possible signal margin, which is exactly the point of digital.
In layout, this means that although they are similar, digital devices require less care in layout then analog devices.
But ultimatly, they are both laid out the same.