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