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