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