Yes,  a PCM student can do dioloma in travel and tourism.

Top institutes which are offering this course are as follows:

• Munnar Catering College
• Delhi College of Advanced Studies, Janakpuri
• Guru Gobind Singh Indraprastha University
• Sharaf Arts and Science College

The tuition fees by average for Diploma in Travel and Tourism comes between INR 50,000 to 4 Lacs.

Major Job profile and designations for these graduates are Front Office Executive, Lobby Manager, Tour Operator, Tour Operation Manager, transport Officer, Travel Executive, Travel Agent, Operations Executive, Information Assistant, Visa Executive, and such.etc.

Hope it helps.

Thanks!