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