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