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