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