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