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