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