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