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