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