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