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