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)(11,16)(12,14)(13,15)(17,18,21,23)(19,26,27,32)(20,24,30,29)(22,28,31,25)(2,5)(6,8)(9,11,13,12)(10,14,15,16)(18,23)(19,27)(24,29)(25,28)(11,12)(14,16)(17,19,22,29,21,27,31,24)(18,20,25,26,23,30,28,32)(1,3,4,7)(2,6,5,8)(9,12,13,11)(10,14,15,16)(17,20,21,30)(18,24,23,29)(19,28,27,25)(22,26,31,32)(11,12)(14,16)(19,27)(20,30)(24,29)(26,32) 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.