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