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