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