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