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)(11,15)(12,14)(13,16)(17,18,21,23)(19,22,26,30)(20,24,27,31)(25,29,28,32)(2,6)(7,8)(11,16)(13,15)(19,25)(20,27)(22,29)(24,31)(26,28)(30,32) involution — undirected(1,3,5,4)(2,7,6,8)(9,11,12,16)(10,13,14,15)(1,4,5,3)(2,8,6,7)(10,14)(13,15)(17,19)(18,22)(20,28)(21,26)(23,30)(24,32)(25,27)(29,31)(2,6)(7,8)(18,23)(19,26)(24,31)(25,28) 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.