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