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