The sensor software does not currently support being able to send the alerts in a syslog format.
Cisco does offer the IPS Event Viewer (IEV) at no extra charge when you have a Cisco Service for IPS maintenance contract on your sensor. You need the contract for loading new signature updates anyway, so it won't cause you any additional money.
The IEV is able to pull events from the sensor in their native SDEE format and provide you a graphical interface for viewing and reporting on the alerts.
http://www.cisco.com/cgi-bin/tablebuild.pl/ips-ev