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