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