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