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