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