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