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