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