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