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