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