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