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