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