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