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