One vertex per element, one color per generator, with an edge from x to x·s.
(2,6,8,11)(7,15,16,14)(18,23)(19,26)(20,21)(25,28)(27,29)(30,31)(1,2)(3,7)(4,11)(5,8)(6,13)(9,14)(10,16)(12,15)(17,18)(19,24)(20,28)(21,23)(22,25)(26,31)(27,32)(29,30) involution — undirected(1,3,5,10)(2,7,8,16)(4,12,13,9)(6,14,11,15)(17,19,22,27)(18,24,25,32)(20,26,21,29)(23,30,28,31)(17,20,22,21)(18,23,25,28)(19,26,27,29)(24,30,32,31)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.