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)(11,14)(12,13)(15,16)(17,18,20,25,21,26,22,23)(19,27,30,31,29,24,28,32)(2,6)(7,8)(18,23)(19,28)(20,22)(24,27)(25,26)(29,30) involution — undirected(1,3,5,4)(2,7,6,8)(10,13)(14,16)(17,19,22,28,21,29,20,30)(18,24,23,31,26,27,25,32)(1,4,5,3)(2,8,6,7)(17,19,20,30,21,29,22,28)(18,24,25,32,26,27,23,31)(9,11,12,15)(10,14,13,16)(19,29)(24,27)(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.