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