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)(11,14)(12,13)(15,16)(19,21)(20,23)(25,26,28,30)(27,31,32,29)(1,2,5,6)(3,4,8,7)(10,13)(14,16)(17,18,22,24)(19,23,21,20)(25,26,28,30)(27,29,32,31)(2,6)(3,8)(9,11,12,15)(10,14,13,16)(17,19,22,21)(18,23,24,20)(25,26)(27,29)(28,30)(31,32)(1,3)(2,4)(5,8)(6,7)(9,11)(10,14)(12,15)(13,16)(17,20)(18,19)(21,24)(22,23) involution — undirected(1,4)(2,3)(5,7)(6,8)(9,10)(11,14)(12,13)(15,16)(17,21,22,19)(18,20,24,23)(25,27)(26,29)(28,32)(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.