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