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