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