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