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