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)(11,13)(12,14)(15,16)(18,24)(19,28)(26,31)(27,30)(2,5)(6,8)(9,11,12,15)(10,13,14,16)(17,18)(19,29)(20,26)(21,27)(22,24)(23,30)(25,31)(28,32)(1,3,4,7)(2,6,5,8)(10,14)(13,16)(17,19,22,28)(18,25,24,20)(21,31,23,26)(27,32,30,29)(17,20)(18,26)(19,30)(21,32)(22,25)(23,29)(24,31)(27,28) involution — undirected(17,21)(19,31)(22,23)(26,28)(27,30)(29,32) involution — undirectedA 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.