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