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