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