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