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