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