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