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