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