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