The pattern is called
Hexadaisy and is a very reasonable $4.50 on Etsy. It's a digital download. It's a paper pieced pattern, and the pieces shown in the pdf are for the 24" finished size, and there are tables with the info on the resize factor to use to get other sizes. There is a coloring sheet included, to make it easy to play with different color layout options. (I copied the image into Paint which made it super easy to color in.)
For anyone making this pattern, I highly recommend the patterns instruction to make a copy of the coloring sheet and then cut it up into all the component triangles. With the rainbow option (12 different colors), every block is different but some are very similar, and it would be very easy to get lost. Looking at the triangles for the what I was working on (I liked doing about 3 at a time), I could easily check my work - e.g. I"ve got the light blue and dark blue over here in that order, so the next strip is the *light* green, not the dark green".