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