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