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