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