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