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