One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,6,11)(3,12,15,16)(4,10,5,9)(7,13,8,14)(17,18,21,25)(19,22,28,31)(20,29,27,24)(23,32,30,26)(1,3)(2,7)(4,13)(5,14)(6,15)(8,11)(9,16)(10,12)(18,22)(19,26)(20,27)(23,24)(25,31)(28,32)(29,30) involution — undirected(1,3)(2,8)(4,13)(5,14)(6,15)(7,11)(9,12)(10,16) involution — undirected(1,4,6,5)(2,9,11,10)(3,13,15,14)(7,16,8,12)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.