Usually IR images are post-processed to get them this particular appearance of blue sky and pale-yellow vegetation. It is done by a red-blue channel swapping. In principle this can be also done here as it is shown below. I am a bit hesitant to come up here with somewhat more categorical statement because I am not entirely satisfied with the results. For some reasons the images recorded with the camera are poorly color saturated. It is possible to boost the saturation but with the limited color depth resolution you certainly end up with more or less obvious artifacts (also visible in the pictures below). I expect one of the following reasons: a cheap sensor camera with no raw images or some inadequate settings (whitebalans or other internal camera).