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