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