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