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