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