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