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)(11,13)(12,14)(15,16)(17,18)(19,26)(20,23)(21,25)(22,30)(24,27)(28,32)(29,31)(1,3)(2,6)(4,7)(5,8)(9,10)(11,15)(12,14)(13,16) involution — undirected(1,2,5,4)(3,6,8,7)(9,11)(10,13)(12,16)(14,15)(17,19,27,29,21,28,20,30)(18,22,23,32,25,31,24,26)(1,2,5,4)(3,7,8,6)(11,16)(13,15)(19,28)(22,31)(26,32)(29,30)(1,4,5,2)(3,7,8,6)(10,14)(13,15)(17,20,21,27)(18,23,25,24)(19,29,28,30)(22,26,31,32)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.