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