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