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