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