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