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