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)(11,13)(12,14)(15,16)(17,18,21,26,22,25,20,23)(19,24,28,31,27,32,29,30)(9,11)(10,13)(12,15)(14,16)(18,23)(19,27)(20,21)(24,31)(25,26)(30,32) involution — undirected(2,5)(6,8)(11,15)(13,16)(17,19)(18,24)(20,29)(21,28)(22,27)(23,30)(25,32)(26,31) involution — undirected(11,15)(13,16)(17,20,22,21)(18,23,25,26)(19,28,27,29)(24,31,32,30)(1,3,4,7)(2,6,5,8)(10,14)(13,16)(18,25)(23,26)(24,32)(30,31)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.