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