Hi Tony,
I dont know whether any bandwidth graph monitor software is available for UCS or not,But der is an option for monitoring the bandwidth traffic of the particular port of FI in UCS that is called traffic monitor session .
Please go through this below link.I think it will help you.
https://supportforums.cisco.com/discussion/11538286/monitoring-cisco-ucs-devices
http://benincosa.com/blog/?p=626
http://benincosa.com/blog/?p=622
https://www.youtube.com/watch?v=PHTdXy_8Zdg.
https://supportforums.cisco.com/sites/default/files/legacy/8/5/5/130558-Using_MRTG_for_UCSM_Traffic_Analysis.pdf