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