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