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