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