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