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