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