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