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