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