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