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