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)(11,13,15,16)(17,18)(19,20)(21,25)(22,23)(24,28)(26,27)(29,30)(31,32)(2,6)(3,8)(11,15)(13,16)(18,23)(19,24)(25,32)(26,29) involution — undirected(1,3)(2,4)(5,8)(6,7)(9,10)(11,13)(12,14)(15,16)(18,23)(19,24)(25,32)(26,29) involution — undirected(1,3)(2,4)(5,8)(6,7)(9,11)(10,13)(12,15)(14,16)(17,19,22,24)(18,20,23,28)(21,29,31,26)(25,30,32,27)(1,4)(2,3)(5,7)(6,8)(9,10)(11,13)(12,14)(15,16)(17,20)(18,24)(19,23)(21,30)(22,28)(25,26)(27,31)(29,32) involution — undirected(17,21,22,31)(18,25,23,32)(19,26,24,29)(20,27,28,30)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.