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