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