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