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