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