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