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