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