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