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