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