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