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