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