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