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