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