Some of the people from LGBTQIA community put a flag next to their names.
People with disabilities are difficult to locate.
The best option would be to regularly post on LI and let people know that you are looking to hire diverse candidates.
Also, there are lot of groups which you may join.
From India, Delhi
Fostering workforce diversity is always a challenge. The factors of workforce diversity are:
b) Language/Mother tongue
g) Gender (it includes third gender as well)
h) Specially-enabled persons
g) Skin colour
To begin with, I recommend you do a categorisation of the workforce on the above factors. Once you understand which factors are least represented, you can start recruiting the increase the percentage of that factor. Fostering workforce diversity is an ongoing exercise and every year you need to do the break-up of the manpower and understand which factors merit your focus.
To foster diversity, you cannot rely just on LinkedIn. You need to take help from the job portals popular in the various regions in which your company has offices.
From India, Bangalore
From India, Mumbai