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