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