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