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