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