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)(19,28)(20,30)(21,25)(22,26)(23,27)(24,31)(29,32) involution — undirected(2,5)(6,8)(9,10)(11,13)(12,14)(15,16)(17,19)(18,20)(21,24)(22,30)(23,29)(25,32)(26,28)(27,31) involution — undirected(3,7)(6,8)(10,13)(11,16)(14,15)(17,20,22,28)(18,24,26,29)(19,25,30,27)(21,32,23,31)(1,3,4,7)(2,6,5,8)(17,21,22,23)(18,25,26,27)(19,29,30,24)(20,31,28,32)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.