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