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