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