did you try TmoleX? It visualizes the COSMO cavity. Start TmoleX (on your local desktop), generate a new project (if you start TmoleX for the first time) and use the File -> 'Open Job/Control File' menu to read in the control file from the directory your job has been running. Then switch to 'Results' and click on the 'View .cosmo File' button.
This will open the COSMOview program, which, by the way, can also be started as an own application (is part of the TmoleX installation).
To see the individual surface patches rather than the nice smooth picture, you have to change the settings. Click on the settings button in the tool bar, switch to 'COSMO cavities' and set 'Segments' instead of 'Wireframe' in the upper part of the settings window. Apply and/or save the settings and then click on the 'Display Segments' button (the icon that looks like a wireframe cavity).