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