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