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