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