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