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