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