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