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