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