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