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