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