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