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