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