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