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