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