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