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