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