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