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