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