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