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