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