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