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