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