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