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