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