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