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