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