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