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