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