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