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