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