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