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