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