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