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