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