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