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