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