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