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