How do I draw a transistor with a circle at the base?
That circle is used to show a P-channel device, as opposed to an N-channel.  The idea is the that the gate behavior is inverted.

It isn't very common* to draw it that way, but it means the same thing as a more typical P-FET symbol.  The schematic tool on this site doesn't use it.  Just use the P-MOS or P-FET symbols, they mean the same thing.

*As Hearth points out in the comments, it is pretty typical to find these on CMOS topology diagrams.