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