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