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