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