Conditionally display custom fields based on category

Hello,

I want to conditionally display few custom fields based on the category while creating a SR in Redwood Helpdesk page. 

For e.g. when a user selects 'Absence Issue' category, I would like to show the fields 'Absence Start Date', 'Absence End Date', etc. Similarly when the user selects 'Payslip Issue' category, the expectation is to show 'Pay Date', etc.

The same logic applies for Edit SR page as well as View SR page. I am aware that we need to use Visual Builder to for such customizations and have been going through lots of documentation to understand how this can be achieved.