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