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