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