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