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