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)(11,13)(12,14)(15,16)(17,18,22,27,23,21,26,32)(19,24,20,25,28,29,30,31)(1,3)(2,5)(4,8)(6,7)(9,11,12,15)(10,13,14,16)(17,19)(18,24)(20,22)(21,29)(23,28)(25,27)(26,30)(31,32)(10,14)(13,16)(17,20)(18,25)(19,26)(21,31)(22,28)(23,30)(24,32)(27,29) involution — undirected(3,8)(5,7)(18,21)(19,28)(20,30)(27,32) involution — undirected(2,6)(5,7)(17,21,22,32,23,18,26,27)(19,29,20,31,28,24,30,25)A 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.