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