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