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