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