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