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