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)(13,15)(14,16)(17,18,22,24)(19,20,21,23)(25,26,28,31)(27,29,32,30)(2,4)(3,7)(9,11,13,16)(10,14,15,12)(17,19)(18,23)(20,24)(21,22)(25,27)(26,29)(28,32)(30,31)(2,4)(6,8)(10,15)(12,14)(18,24)(19,21)(25,27,28,32)(26,30,31,29)(1,3)(2,6)(4,8)(5,7)(9,11)(10,14)(12,15)(13,16)(17,20)(18,19)(21,24)(22,23)(25,27)(26,30)(28,32)(29,31) involution — undirected(1,4,5,2)(3,8,7,6)(9,12,13,14)(10,11,15,16)(17,21,22,19)(18,20,24,23)(25,26)(27,30)(28,31)(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.