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)(17,18,23,27)(19,24,26,21)(20,25,30,22)(28,31,32,29)(9,10)(11,15)(12,16)(13,14)(17,19)(18,21)(20,25)(22,30)(23,26)(24,27)(28,31)(29,32) involution — undirected(2,5)(6,8)(9,11,13,12)(10,15,14,16)(17,20,21,29,23,30,24,31)(18,25,19,28,27,22,26,32)(1,3,4,7)(2,6,5,8)(9,12,13,11)(10,16,14,15)(17,21,23,24)(18,26,27,19)(20,29,30,31)(22,28,25,32)(10,14)(15,16)(17,22,21,32,23,25,24,28)(18,20,19,29,27,30,26,31)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.