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