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