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