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