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