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