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