At the moment of writing, Swarm mode is so young, that the existing Docker graphical user interfaces support is yet to come or is in progress.
Shipyard (https://shipyard-project.com/), which has a nice support for Swarm (v1) operations, is now updated to use Swarm mode. At the of writing (August 2016), there is a 1.12 branch on Github, that makes this workable.
At the time this book will be published, probably a stable version will be available for automated deployment already. You can take a look at the instructions at https://shipyard-project.com/docs/deploy/automated/.
It will be something similar to going in SSH to the leader manager host and run a one liner, such as:
curl -sSL https://shipyard-project.com/deploy | bash -s
In case we still need to install a specific non-stable branch, download it from Github to the leader manager host and install Docker Compose.
curl -L
https://github.com/docker/compose/releases/download/1.8.0/docker-
...