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