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