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