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