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