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