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