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