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