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)(11,14)(12,13)(15,16)(17,18,23,27,22,26,21,25)(19,20,28,30,29,31,24,32)(1,3)(2,5)(4,8)(6,7)(17,19,23,28,22,29,21,24)(18,20,27,30,26,31,25,32)(3,8)(5,7)(10,13)(14,16)(17,20)(18,24)(19,27)(21,32)(22,31)(23,30)(25,29)(26,28) involution — undirected(2,6)(5,7) involution — undirected(9,11,12,15)(10,14,13,16)(17,21,22,23)(18,25,26,27)(19,28,29,24)(20,30,31,32)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.