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