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