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