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