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