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