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