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