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