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