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