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