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