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