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