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