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