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