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