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