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