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