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