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