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