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