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