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