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