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)(11,15)(12,16)(13,14)(17,18,21,25,22,24,20,29)(19,26,27,31,28,23,30,32)(9,10)(11,16)(12,15)(13,14)(17,18)(19,26)(20,25)(21,29)(22,24)(23,28)(27,32)(30,31) involution — undirected(2,5)(6,8)(10,14)(15,16)(17,19,22,28)(18,23,24,26)(20,30,21,27)(25,32,29,31)(9,11,13,12)(10,15,14,16)(18,24)(23,26)(25,29)(31,32)(1,3,4,7)(2,6,5,8)(9,12,13,11)(10,15,14,16)(17,20,22,21)(18,25,24,29)(19,27,28,30)(23,31,26,32)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.