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