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