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