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