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