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