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