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