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