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