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