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