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