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