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