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