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