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