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